2312278128 has 30 divisors (see below), whose sum is σ = 6471167664. Its totient is φ = 770759328.

The previous prime is 2312278121. The next prime is 2312278147. The reversal of 2312278128 is 8218722132.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2312278092 and 2312278101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312278121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8028600 + ... + 8028887.

Almost surely, 2^2312278128 is an apocalyptic number.

It is an amenable number.

2312278128 is an abundant number, since it is smaller than the sum of its proper divisors (4158889536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2312278128 is a wasteful number, since it uses less digits than its factorization.

2312278128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16057501 (or 16057492 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 2312278128 is about 48086.1531836349. The cubic root of 2312278128 is about 1322.3508246399.

The spelling of 2312278128 in words is "two billion, three hundred twelve million, two hundred seventy-eight thousand, one hundred twenty-eight".